path trajectoire; trajectoire = (172.764,216.836)..(175.325,218.324)..(177.891,219.743)..(180.461,221.090)..(183.033,222.366) ..(185.606,223.570)..(188.177,224.703)..(190.746,225.764)..(193.310,226.753)..(195.867,227.672) ..(198.417,228.520)..(200.958,229.297)..(203.488,230.006)..(206.006,230.646)..(208.511,231.219) ..(211.001,231.725)..(213.475,232.166)..(215.933,232.541)..(218.372,232.854)..(220.794,233.104) ..(223.196,233.293)..(225.578,233.421)..(227.940,233.490)..(230.280,233.502)..(232.599,233.455) ..(234.895,233.353)..(237.170,233.196)..(239.421,232.985)..(241.649,232.720)..(243.855,232.402) ..(246.036,232.033)..(248.194,231.612)..(250.328,231.140)..(252.437,230.619)..(254.522,230.048) ..(256.582,229.428)..(258.616,228.760)..(260.625,228.044)..(262.608,227.279)..(264.564,226.467) ..(266.493,225.608)..(268.395,224.703)..(270.267,223.750)..(272.111,222.752)..(273.924,221.707) ..(275.707,220.617)..(277.457,219.481)..(279.175,218.301)..(280.858,217.076)..(282.506,215.808) ..(284.118,214.496)..(285.693,213.141)..(287.228,211.744)..(288.724,210.305)..(290.179,208.826) ..(291.592,207.307)..(292.961,205.749)..(294.285,204.153)..(295.563,202.521)..(296.794,200.852) ..(297.977,199.148)..(299.110,197.411)..(300.193,195.641)..(301.224,193.840)..(302.202,192.010) ..(303.126,190.152)..(303.996,188.266)..(304.809,186.356)..(305.567,184.422)..(306.267,182.466) ..(306.908,180.490)..(307.491,178.494)..(308.015,176.483)..(308.478,174.456)..(308.880,172.415) ..(309.221,170.364)..(309.501,168.303)..(309.719,166.234)..(309.875,164.159)..(309.969,162.080) ..(310.000,160.000)..(309.969,157.920)..(309.875,155.841)..(309.719,153.766)..(309.501,151.697) ..(309.221,149.636)..(308.880,147.585)..(308.478,145.544)..(308.015,143.517)..(307.491,141.506) ..(306.908,139.510)..(306.267,137.534)..(305.567,135.578)..(304.809,133.644)..(303.996,131.734) ..(303.126,129.848)..(302.202,127.990)..(301.224,126.160)..(300.193,124.359)..(299.110,122.589) ..(297.977,120.852)..(296.794,119.148)..(295.563,117.479)..(294.285,115.847)..(292.961,114.251) ..(291.592,112.693)..(290.179,111.174)..(288.724,109.695)..(287.228,108.256)..(285.693,106.859) ..(284.118,105.504)..(282.506,104.192)..(280.858,102.924)..(279.175,101.699)..(277.457,100.519) ..(275.707,99.383)..(273.924,98.293)..(272.111,97.248)..(270.267,96.250)..(268.395,95.297) ..(266.493,94.392)..(264.564,93.533)..(262.608,92.721)..(260.625,91.956)..(258.616,91.240) ..(256.582,90.572)..(254.522,89.952)..(252.437,89.381)..(250.328,88.860)..(248.194,88.388) ..(246.036,87.967)..(243.855,87.598)..(241.649,87.280)..(239.421,87.015)..(237.170,86.804) ..(234.895,86.647)..(232.599,86.545)..(230.280,86.498)..(227.940,86.510)..(225.578,86.579) ..(223.196,86.707)..(220.794,86.896)..(218.372,87.146)..(215.933,87.459)..(213.475,87.834) ..(211.001,88.275)..(208.511,88.781)..(206.006,89.354)..(203.488,89.994)..(200.958,90.703) ..(198.417,91.480)..(195.867,92.328)..(193.310,93.247)..(190.746,94.236)..(188.177,95.297) ..(185.606,96.430)..(183.033,97.634)..(180.461,98.910)..(177.891,100.257)..(175.325,101.676) ..(172.764,103.164)..(170.209,104.723)..(167.662,106.350)..(165.125,108.045)..(162.598,109.805) ..(160.082,111.631)..(157.578,113.520)..(155.087,115.470)..(152.608,117.479)..(150.142,119.546) ..(147.688,121.667)..(145.247,123.841)..(142.816,126.065)..(140.395,128.336)..(137.983,130.652) ..(135.576,133.009)..(133.174,135.403)..(130.774,137.833)..(128.372,140.294)..(125.965,142.782) ..(123.548,145.293)..(121.119,147.823)..(118.672,150.367)..(116.201,152.920)..(113.702,155.475) ..(111.169,158.027)..(108.595,160.568)..(105.974,163.089)..(103.301,165.581)..(100.569,168.034) ..(97.772,170.435)..(94.906,172.771)..(91.968,175.026)..(88.954,177.183)..(85.868,179.226) ..(82.711,181.134)..(79.492,182.889)..(76.221,184.472)..(72.914,185.869)..(69.590,187.065) ..(66.270,188.053)..(62.978,188.830)..(59.738,189.398)..(56.570,189.764)..(53.495,189.942) ..(50.528,189.945)..(47.680,189.793)..(44.961,189.501)..(42.374,189.090)..(39.921,188.575) ..(37.601,187.972)..(35.411,187.296)..(33.348,186.557)..(31.407,185.768)..(29.583,184.938) ..(27.871,184.073)..(26.266,183.181)..(24.761,182.268)..(23.353,181.337)..(22.036,180.392) ..(20.806,179.437)..(19.658,178.475)..(18.590,177.506)..(17.597,176.534)..(16.676,175.559) ..(15.824,174.582)..(15.038,173.604)..(14.316,172.627)..(13.656,171.650)..(13.056,170.673) ..(12.513,169.698)..(12.027,168.723)..(11.595,167.750)..(11.217,166.778)..(10.891,165.807) ..(10.618,164.838)..(10.394,163.869)..(10.221,162.901)..(10.098,161.934)..(10.025,160.967) ..(10.000,160.000)..(10.025,159.033)..(10.098,158.066)..(10.221,157.099)..(10.394,156.131) ..(10.618,155.162)..(10.891,154.193)..(11.217,153.222)..(11.595,152.250)..(12.027,151.277) ..(12.513,150.302)..(13.056,149.327)..(13.656,148.350)..(14.316,147.373)..(15.038,146.396) ..(15.824,145.418)..(16.676,144.441)..(17.597,143.466)..(18.590,142.494)..(19.658,141.525) ..(20.806,140.563)..(22.036,139.608)..(23.353,138.663)..(24.761,137.732)..(26.266,136.819) ..(27.871,135.927)..(29.583,135.062)..(31.407,134.232)..(33.348,133.443)..(35.411,132.704) ..(37.601,132.028)..(39.921,131.425)..(42.374,130.910)..(44.961,130.499)..(47.680,130.207) ..(50.528,130.055)..(53.495,130.058)..(56.570,130.236)..(59.738,130.602)..(62.978,131.170) ..(66.270,131.947)..(69.590,132.935)..(72.914,134.131)..(76.221,135.528)..(79.492,137.111) ..(82.711,138.866)..(85.868,140.774)..(88.954,142.817)..(91.968,144.974)..(94.906,147.229) ..(97.772,149.565)..(100.569,151.966)..(103.301,154.419)..(105.974,156.911)..(108.595,159.432) ..(111.169,161.973)..(113.702,164.525)..(116.201,167.080)..(118.672,169.633)..(121.119,172.177) ..(123.548,174.707)..(125.965,177.218)..(128.372,179.706)..(130.774,182.167)..(133.174,184.597) ..(135.576,186.991)..(137.983,189.348)..(140.395,191.664)..(142.816,193.935)..(145.247,196.159) ..(147.688,198.333)..(150.142,200.454)..(152.608,202.521)..(155.087,204.530)..(157.578,206.480) ..(160.082,208.369)..(162.598,210.195)..(165.125,211.955)..(167.662,213.650)..(170.209,215.277) ..(172.764,216.836); b := 80; d := 320; beginfig(1); draw trajectoire withpen pencircle scaled 1pt withcolor 0.4white; for i:= b step b until d: draw (point i of trajectoire) withpen pencircle scaled 5pt withcolor blue; endfor; draw (point 0 of trajectoire) withpen pencircle scaled 5pt withcolor red; endfig; end