path trajectoire; trajectoire = (310.000,160.000)..(309.945,162.369)..(309.779,164.733)..(309.503,167.087)..(309.118,169.426) ..(308.624,171.744)..(308.023,174.037)..(307.316,176.300)..(306.504,178.529)..(305.591,180.719) ..(304.577,182.865)..(303.464,184.963)..(302.256,187.010)..(300.955,189.001)..(299.564,190.933) ..(298.086,192.803)..(296.523,194.607)..(294.879,196.343)..(293.158,198.008)..(291.361,199.599) ..(289.493,201.115)..(287.557,202.553)..(285.556,203.912)..(283.492,205.191)..(281.370,206.389) ..(279.191,207.505)..(276.957,208.538)..(274.670,209.486)..(272.332,210.350)..(269.943,211.128) ..(267.506,211.819)..(265.020,212.420)..(262.488,212.931)..(259.912,213.351)..(257.291,213.677) ..(254.629,213.908)..(251.927,214.042)..(249.186,214.079)..(246.408,214.015)..(243.597,213.849) ..(240.753,213.581)..(237.880,213.207)..(234.981,212.727)..(232.058,212.140)..(229.115,211.443) ..(226.156,210.638)..(223.184,209.722)..(220.204,208.696)..(217.219,207.561)..(214.233,206.316) ..(211.251,204.964)..(208.277,203.506)..(205.313,201.945)..(202.363,200.283)..(199.430,198.523) ..(196.515,196.669)..(193.619,194.726)..(190.744,192.696)..(187.887,190.584)..(185.048,188.394) ..(182.223,186.131)..(179.408,183.798)..(176.597,181.399)..(173.782,178.938)..(170.953,176.419) ..(168.097,173.844)..(165.197,171.217)..(162.232,168.542)..(159.174,165.824)..(155.983,163.071) ..(152.609,160.297)..(148.976,157.535)..(144.980,154.848)..(140.483,152.381)..(135.362,150.437) ..(129.716,149.505)..(124.075,149.882)..(118.968,151.273)..(114.495,153.191)..(110.529,155.331) ..(106.933,157.552)..(103.599,159.788)..(100.451,162.009)..(97.435,164.200)..(94.509,166.351) ..(91.643,168.456)..(88.812,170.509)..(85.998,172.503)..(83.185,174.432)..(80.360,176.288) ..(77.514,178.060)..(74.639,179.740)..(71.731,181.315)..(68.788,182.774)..(65.811,184.102) ..(62.804,185.288)..(59.774,186.319)..(56.731,187.183)..(53.686,187.871)..(50.656,188.374) ..(47.656,188.690)..(44.703,188.815)..(41.817,188.753)..(39.013,188.510)..(36.308,188.093) ..(33.715,187.513)..(31.246,186.783)..(28.909,185.917)..(26.711,184.930)..(24.656,183.835) ..(22.747,182.646)..(20.985,181.376)..(19.367,180.038)..(17.892,178.642)..(16.557,177.199) ..(15.359,175.717)..(14.293,174.203)..(13.356,172.665)..(12.543,171.109)..(11.850,169.538) ..(11.273,167.958)..(10.808,166.371)..(10.451,164.780)..(10.199,163.188)..(10.050,161.594) ..(10.000,160.000)..(10.050,158.406)..(10.199,156.812)..(10.451,155.220)..(10.808,153.629) ..(11.273,152.042)..(11.850,150.462)..(12.543,148.891)..(13.356,147.335)..(14.293,145.797) ..(15.359,144.283)..(16.557,142.801)..(17.892,141.358)..(19.367,139.962)..(20.985,138.624) ..(22.747,137.354)..(24.656,136.165)..(26.711,135.070)..(28.909,134.083)..(31.246,133.217) ..(33.715,132.487)..(36.308,131.907)..(39.013,131.490)..(41.817,131.247)..(44.703,131.185) ..(47.656,131.310)..(50.656,131.626)..(53.686,132.129)..(56.731,132.817)..(59.774,133.681) ..(62.804,134.712)..(65.811,135.898)..(68.788,137.226)..(71.731,138.685)..(74.639,140.260) ..(77.514,141.940)..(80.360,143.712)..(83.185,145.568)..(85.998,147.497)..(88.812,149.491) ..(91.643,151.544)..(94.509,153.649)..(97.435,155.800)..(100.451,157.991)..(103.599,160.212) ..(106.933,162.448)..(110.529,164.669)..(114.495,166.809)..(118.968,168.727)..(124.075,170.118) ..(129.716,170.495)..(135.362,169.563)..(140.483,167.619)..(144.980,165.152)..(148.976,162.465) ..(152.609,159.703)..(155.983,156.929)..(159.174,154.176)..(162.232,151.458)..(165.197,148.783) ..(168.097,146.156)..(170.953,143.581)..(173.782,141.062)..(176.597,138.601)..(179.408,136.202) ..(182.223,133.869)..(185.048,131.606)..(187.887,129.416)..(190.744,127.304)..(193.619,125.274) ..(196.515,123.331)..(199.430,121.477)..(202.363,119.717)..(205.313,118.055)..(208.277,116.494) ..(211.251,115.036)..(214.233,113.684)..(217.219,112.439)..(220.204,111.304)..(223.184,110.278) ..(226.156,109.362)..(229.115,108.557)..(232.058,107.860)..(234.981,107.273)..(237.880,106.793) ..(240.753,106.419)..(243.597,106.151)..(246.408,105.985)..(249.186,105.921)..(251.927,105.958) ..(254.629,106.092)..(257.291,106.323)..(259.912,106.649)..(262.488,107.069)..(265.020,107.580) ..(267.506,108.181)..(269.943,108.872)..(272.332,109.650)..(274.670,110.514)..(276.957,111.462) ..(279.191,112.495)..(281.370,113.611)..(283.492,114.809)..(285.556,116.088)..(287.557,117.447) ..(289.493,118.885)..(291.361,120.401)..(293.158,121.992)..(294.879,123.657)..(296.523,125.393) ..(298.086,127.197)..(299.564,129.067)..(300.955,130.999)..(302.256,132.990)..(303.464,135.037) ..(304.577,137.135)..(305.591,139.281)..(306.504,141.471)..(307.316,143.700)..(308.023,145.963) ..(308.624,148.256)..(309.118,150.574)..(309.503,152.913)..(309.779,155.267)..(309.945,157.631) ..(310.000,160.000); b := 50; d := 250; 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